I used to be into gaming, but I kept winding up with a sort of "empty" feeling after playing for 3 hours and then turning the console off. As if the time that was spent gaming was a sort of empty hole in my day.
So instead I decided to try doing some writing, which I've always liked to do. Mostly sci-fi, but whatever I'm interested in at that moment, really. Haven't finished a book yet, but world-building is really fun. I suppose it could be kind of similar to fish-keeping - you create the small water-world that your inhabitants (fish) will live in.